Ad-Rock urged New Yorkers to “reject Donald Trump’s vision for America” during Sunday’s rally at a Brooklyn park named in memory of his late bandmate Adam ‘MCA’ Yauch.

The rally was organised in response to the playground being defaced with swastikas and pro-Trump graffiti last week. After talking about Yauch’s belief in nonviolence, Adam ‘Ad-Rock’ Horowitz listed many examples of vandalism and hate crimes around the country that have been reported since Trump’s election win.

“Keep your eyes open, stand up for each other. This is homegrown terrorism for real,” Horovitz said. “I reject Donald Trump’s vision for America. New York City, I’m asking you to do the same.”

Among those in attendance, including actor Ben Stiller, was acting Brooklyn district attorney Eric Gonzalez, who gave a speech vowing to prosecute all hate crimes. “We will not stand for bigotry in our backyard,” he said.

Imam Khalid Latif, the director of the NYU Islamic Center, urged the crowd to speak up against bigotry.

“For us as New Yorkers, if you see something say something has to mean something different today,” he said, referencing the Homeland Security Department’s motto to encourage people to report potential terrorism.

“If you see hatred, say something. If you see racism, say something. If you see bigotry, say something. In our city, we have to set an example for the rest of the country.” [via NY Daily News]